When I wrote my response, you must have been writing the update at the same time, as it wasn't there when I read the topic originally.
So... What do I do with them now then?
Let them go?
Where/How?
Seeing as you already have them I personally would keep them. It seems from your posts that you know how to look after them appropriately, so I think you should (and, not feel bad about it!) There is a huge difference between philosophical reasoning and practicable acts - and I think it would now be more harmful to let the worms go than to look after them.
I seem to have talked around in a circle, but my (very strange) conclusion is this:
-having the worms = unvegan
-seeing as you have the worms already, it's less-vegan to let them go and more-vegan to look after them.
Plus, having said all of that - I'm only talking about what 'vegan' means for me and my life. You may well come to different conclusions all together (and that's one of the things that makes life so wonderful!)